1/**************************************************************************
2 *
3 * Copyright 2003 VMware, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28#include "i915_context.h"
29#include "main/api_exec.h"
30#include "main/framebuffer.h"
31#include "main/extensions.h"
32#include "main/macros.h"
33#include "main/state.h"
34#include "main/version.h"
35#include "main/vtxfmt.h"
36#include "intel_chipset.h"
37#include "intel_tris.h"
38#include "tnl/t_context.h"
39#include "tnl/t_pipeline.h"
40#include "tnl/t_vertex.h"
41#include "util/u_memory.h"
42
43#include "swrast/swrast.h"
44#include "swrast_setup/swrast_setup.h"
45#include "tnl/tnl.h"
46#include "util/ralloc.h"
47
48#include "i915_reg.h"
49#include "i915_program.h"
50
51/***************************************
52 * Mesa's Driver Functions
53 ***************************************/
54
55/* Override intel default.
56 */
57static void
58i915InvalidateState(struct gl_context * ctx)
59{
60   GLuint new_state = ctx->NewState;
61
62   _swrast_InvalidateState(ctx, new_state);
63   _swsetup_InvalidateState(ctx, new_state);
64   _tnl_InvalidateState(ctx, new_state);
65   _tnl_invalidate_vertex_state(ctx, new_state);
66   intel_context(ctx)->NewGLState |= new_state;
67
68   if (new_state & (_NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT))
69      _mesa_update_draw_buffer_bounds(ctx, ctx->DrawBuffer);
70
71   /* Todo: gather state values under which tracked parameters become
72    * invalidated, add callbacks for things like
73    * ProgramLocalParameters, etc.
74    */
75   {
76      struct i915_fragment_program *p =
77         (struct i915_fragment_program *) ctx->FragmentProgram._Current;
78      if (p && p->nr_params)
79         p->params_uptodate = 0;
80   }
81
82   if (new_state & (_NEW_STENCIL | _NEW_BUFFERS | _NEW_POLYGON))
83      i915_update_stencil(ctx);
84   if (new_state & (_NEW_LIGHT))
85       i915_update_provoking_vertex(ctx);
86   if (new_state & (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS))
87       i915_update_program(ctx);
88   if (new_state & (_NEW_PROGRAM | _NEW_POINT))
89       i915_update_sprite_point_enable(ctx);
90}
91
92
93static void
94i915InitDriverFunctions(struct dd_function_table *functions)
95{
96   intelInitDriverFunctions(functions);
97   i915InitStateFunctions(functions);
98   i915InitFragProgFuncs(functions);
99   functions->UpdateState = i915InvalidateState;
100}
101
102/* Note: this is shared with i830. */
103void
104intel_init_texture_formats(struct gl_context *ctx)
105{
106   struct intel_context *intel = intel_context(ctx);
107   struct intel_screen *intel_screen = intel->intelScreen;
108
109   ctx->TextureFormatSupported[MESA_FORMAT_B8G8R8A8_UNORM] = true;
110   if (intel_screen->deviceID != PCI_CHIP_I830_M &&
111       intel_screen->deviceID != PCI_CHIP_845_G)
112      ctx->TextureFormatSupported[MESA_FORMAT_B8G8R8X8_UNORM] = true;
113   if (intel->gen == 3)
114      ctx->TextureFormatSupported[MESA_FORMAT_B8G8R8A8_SRGB] = true;
115   ctx->TextureFormatSupported[MESA_FORMAT_B4G4R4A4_UNORM] = true;
116   ctx->TextureFormatSupported[MESA_FORMAT_B5G5R5A1_UNORM] = true;
117   ctx->TextureFormatSupported[MESA_FORMAT_B5G6R5_UNORM] = true;
118   ctx->TextureFormatSupported[MESA_FORMAT_L_UNORM8] = true;
119   if (intel->gen == 3)
120      ctx->TextureFormatSupported[MESA_FORMAT_A_UNORM8] = true;
121   ctx->TextureFormatSupported[MESA_FORMAT_I_UNORM8] = true;
122   ctx->TextureFormatSupported[MESA_FORMAT_LA_UNORM8] = true;
123
124   /* Depth and stencil */
125   if (intel->gen == 3) {
126      ctx->TextureFormatSupported[MESA_FORMAT_Z24_UNORM_S8_UINT] = true;
127      ctx->TextureFormatSupported[MESA_FORMAT_Z24_UNORM_X8_UINT] = true;
128
129      /*
130       * This was disabled in initial FBO enabling to avoid combinations
131       * of depth+stencil that wouldn't work together.  We since decided
132       * that it was OK, since it's up to the app to come up with the
133       * combo that actually works, so this can probably be re-enabled.
134       */
135      /*
136      ctx->TextureFormatSupported[MESA_FORMAT_Z_UNORM16] = true;
137      ctx->TextureFormatSupported[MESA_FORMAT_Z24] = true;
138      */
139   }
140
141   /* ctx->Extensions.MESA_ycbcr_texture */
142   ctx->TextureFormatSupported[MESA_FORMAT_YCBCR] = true;
143   ctx->TextureFormatSupported[MESA_FORMAT_YCBCR_REV] = true;
144
145   /* GL_3DFX_texture_compression_FXT1 */
146   ctx->TextureFormatSupported[MESA_FORMAT_RGB_FXT1] = true;
147   ctx->TextureFormatSupported[MESA_FORMAT_RGBA_FXT1] = true;
148
149   /* GL_EXT_texture_compression_s3tc */
150   ctx->TextureFormatSupported[MESA_FORMAT_RGB_DXT1] = true;
151   ctx->TextureFormatSupported[MESA_FORMAT_RGBA_DXT1] = true;
152   ctx->TextureFormatSupported[MESA_FORMAT_RGBA_DXT3] = true;
153   ctx->TextureFormatSupported[MESA_FORMAT_RGBA_DXT5] = true;
154}
155
156extern const struct tnl_pipeline_stage *intel_pipeline[];
157
158bool
159i915CreateContext(int api,
160		  const struct gl_config * mesaVis,
161                  __DRIcontext * driContextPriv,
162                  unsigned major_version,
163                  unsigned minor_version,
164                  uint32_t flags,
165                  unsigned *error,
166                  void *sharedContextPrivate)
167{
168   struct dd_function_table functions;
169   struct i915_context *i915 = align_calloc(sizeof(struct i915_context), 16);
170   struct intel_context *intel = &i915->intel;
171   struct gl_context *ctx = &intel->ctx;
172
173   if (!i915) {
174      *error = __DRI_CTX_ERROR_NO_MEMORY;
175      return false;
176   }
177
178   i915InitVtbl(i915);
179
180   i915InitDriverFunctions(&functions);
181
182   if (!intelInitContext(intel, api, major_version, minor_version, flags,
183                         mesaVis, driContextPriv,
184                         sharedContextPrivate, &functions,
185                         error)) {
186      align_free(i915);
187      return false;
188   }
189
190   intel_init_texture_formats(ctx);
191
192   _math_matrix_ctr(&intel->ViewportMatrix);
193
194   /* Initialize swrast, tnl driver tables: */
195   intelInitTriFuncs(ctx);
196
197   /* Install the customized pipeline: */
198   _tnl_destroy_pipeline(ctx);
199   _tnl_install_pipeline(ctx, intel_pipeline);
200
201   if (intel->no_rast)
202      FALLBACK(intel, INTEL_FALLBACK_USER, 1);
203
204   ctx->Const.MaxTextureUnits = I915_TEX_UNITS;
205   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits = I915_TEX_UNITS;
206   ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits = I915_TEX_UNITS;
207   ctx->Const.MaxTextureCoordUnits = I915_TEX_UNITS;
208   ctx->Const.MaxVarying = I915_TEX_UNITS;
209   ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents =
210      ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents = ctx->Const.MaxVarying * 4;
211   ctx->Const.MaxCombinedTextureImageUnits =
212      ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits +
213      ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
214
215   /* Advertise the full hardware capabilities.  The new memory
216    * manager should cope much better with overload situations:
217    */
218   ctx->Const.MaxTextureSize = 2048;
219   ctx->Const.Max3DTextureLevels = 9;
220   ctx->Const.MaxCubeTextureLevels = 12;
221   ctx->Const.MaxTextureRectSize = (1 << 11);
222   ctx->Const.MaxTextureUnits = I915_TEX_UNITS;
223
224   ctx->Const.MaxTextureMaxAnisotropy = 4.0;
225
226   /* GL_ARB_fragment_program limits - don't think Mesa actually
227    * validates programs against these, and in any case one ARB
228    * instruction can translate to more than one HW instruction, so
229    * we'll still have to check and fallback each time.
230    */
231   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeTemps = I915_MAX_TEMPORARY;
232   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeAttribs = 11;    /* 8 tex, 2 color, fog */
233   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeParameters = I915_MAX_CONSTANT;
234   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeAluInstructions = I915_MAX_ALU_INSN;
235   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeTexInstructions = I915_MAX_TEX_INSN;
236   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeInstructions = (I915_MAX_ALU_INSN +
237                                                       I915_MAX_TEX_INSN);
238   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeTexIndirections =
239      I915_MAX_TEX_INDIRECT;
240   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeAddressRegs = 0; /* I don't think we have one */
241   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxEnvParams =
242      MIN2(ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxNativeParameters,
243	   ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxEnvParams);
244
245   /* i915 stores all values in single-precision floats.  Values aren't set
246    * for other program targets because software is used for those targets.
247    */
248   ctx->Const.Program[MESA_SHADER_FRAGMENT].MediumFloat.RangeMin = 127;
249   ctx->Const.Program[MESA_SHADER_FRAGMENT].MediumFloat.RangeMax = 127;
250   ctx->Const.Program[MESA_SHADER_FRAGMENT].MediumFloat.Precision = 23;
251   ctx->Const.Program[MESA_SHADER_FRAGMENT].LowFloat = ctx->Const.Program[MESA_SHADER_FRAGMENT].HighFloat =
252      ctx->Const.Program[MESA_SHADER_FRAGMENT].MediumFloat;
253   ctx->Const.Program[MESA_SHADER_FRAGMENT].MediumInt.RangeMin = 24;
254   ctx->Const.Program[MESA_SHADER_FRAGMENT].MediumInt.RangeMax = 24;
255   ctx->Const.Program[MESA_SHADER_FRAGMENT].MediumInt.Precision = 0;
256   ctx->Const.Program[MESA_SHADER_FRAGMENT].LowInt = ctx->Const.Program[MESA_SHADER_FRAGMENT].HighInt =
257      ctx->Const.Program[MESA_SHADER_FRAGMENT].MediumInt;
258
259   ctx->FragmentProgram._MaintainTexEnvProgram = true;
260   _mesa_reset_vertex_processing_mode(ctx);
261
262   /* FINISHME: Are there other options that should be enabled for software
263    * FINISHME: vertex shaders?
264    */
265   ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitNoIndirectSampler =
266      true;
267
268   struct gl_shader_compiler_options *const fs_options =
269      & ctx->Const.ShaderCompilerOptions[MESA_SHADER_FRAGMENT];
270   fs_options->MaxIfDepth = 0;
271   fs_options->EmitNoPow = true;
272   fs_options->EmitNoMainReturn = true;
273   fs_options->EmitNoIndirectInput = true;
274   fs_options->EmitNoIndirectOutput = true;
275   fs_options->EmitNoIndirectUniform = true;
276   fs_options->EmitNoIndirectTemp = true;
277   fs_options->EmitNoIndirectSampler = true;
278
279   ctx->Const.MaxDrawBuffers = 1;
280   ctx->Const.QueryCounterBits.SamplesPassed = 0;
281
282   _tnl_init_vertices(ctx, ctx->Const.MaxArrayLockSize + 12,
283                      36 * sizeof(GLfloat));
284
285   intel->verts = TNL_CONTEXT(ctx)->clipspace.vertex_buf;
286
287   i915InitState(i915);
288
289   /* Always enable pixel fog.  Vertex fog using fog coord will conflict
290    * with fog code appended onto fragment program.
291    */
292   _tnl_allow_vertex_fog(ctx, 0);
293   _tnl_allow_pixel_fog(ctx, 1);
294
295   _mesa_override_extensions(ctx);
296   _mesa_compute_version(ctx);
297
298   _mesa_initialize_dispatch_tables(ctx);
299   _mesa_initialize_vbo_vtxfmt(ctx);
300
301   return true;
302}
303